121920528 has 20 divisors (see below), whose sum is σ = 314961488. Its totient is φ = 40640160.

The previous prime is 121920499. The next prime is 121920529. The reversal of 121920528 is 825029121.

It is a junction number, because it is equal to n+sod(n) for n = 121920495 and 121920504.

It is not an unprimeable number, because it can be changed into a prime (121920529) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1269958 + ... + 1270053.

Almost surely, 2^121920528 is an apocalyptic number.

It is an amenable number.

121920528 is an abundant number, since it is smaller than the sum of its proper divisors (193040960).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121920528 is a wasteful number, since it uses less digits than its factorization.

121920528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2540022 (or 2540016 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 30.

The square root of 121920528 is about 11041.7629027253. The cubic root of 121920528 is about 495.8598502747.

Adding to 121920528 its reverse (825029121), we get a palindrome (946949649).

The spelling of 121920528 in words is "one hundred twenty-one million, nine hundred twenty thousand, five hundred twenty-eight".